The marks (out of 10) obtained by 28 students in a Mathematics test are listed as below: 8,1, 2, 6, 5, 5, 5,0,1, 9, 7, 8, 0, 5, 8, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2, 0 find The number of students who obtained marks more than or equal to 5, is
(a) 13
(b) 15
(c) 16
(d) 17
Answers
Option (d) is correct.
Explanation of the AnswEr :
Arranging the given marks which are obtained by 28 students in a mathematics test in ascending order. Therefore,
- 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 10, 10.
Counting the number of students who obtained marks more than 5 or equal to 5.
- 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 10, 10.
After counting the given data, the number of students who obtained marks more than 5 or equal to 5 are 17.
•°• Correct option is option (d).
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Answer:
Given :-
Marks obtained by 28 students
8,1, 2, 6, 5, 5, 5,0,1, 9, 7, 8, 0, 5, 8, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2, 0
To Find :-
Numbers of students who scored more than or equal to 5
Solution :-
First of all let's represent them as tally mark
5 - ||||(4)
6 - |(1)
7 - ||(2)
8 - |||||| (6)
9 - ||(2)
10 - ||(2)
=> 4 + 1 + 2 + 6 + 2 + 2
=> 5 + 2 + 6 + 2 + 2
=> 7 + 6 + 2 + 2
=> 13 + 2 + 2
=> 15 + 2
=>17